Sodium Dichloro-s-Triazinetrione-Dihydrate

[dlong]

You can certainly add Dichlor to your pool by just throwing it in, but just keep in mind that for every 1 ppm FC that you add (i.e. the amount that you throw in that produces 1 ppm FC), you also add 0.9 ppm (almost 1 ppm) of CYA. So if you are low in CYA, then there's no problem; otherwise, I wouldn't use the Dichlor. I suspect that since you are using Tri-Chlor in an automatic feeder that your CYA level might be high already. Have you tested it? Unless your pool is small-ish (10,000 gallons or smaller) and do frequent backwashing, your CYA is probably already too high due to your use of Tri-Chlor.

Richard

Not lately. 6 Months ago it was 0 (I stopped using Tri-Chlor for 3-5 months because it was high, over 100). Last time I check 4 months? It was low. I don't have a backwashing mechanism and I also don't drain and fill the pool (I also don't use the pool).

If I didn't live in FL (where the water level is high), I would of drain the pool 3 years ago ...

I guess, I just need to key an eye on the CYA if I plan on using this Di-Chlor stuff.


-d

[CarlD]

Of course, Chem_Geek is correct. Once it's dissolved in the water, chlorine is chlorine--and all the additives are a seperate issue.

If you've been using Cal-Hypo, it is perfectly safe to use Di-Chlor or Bleach for additional chlorination. Again, once it's been dissolved in the water, it's safe to use another form.

But you NEVER mix chlorine types together--You don't use floaters with Cal-Hypo that had Tri-chlor in them before. If you have an in-line chlorinator ONLY use Tri-chlor in it.

[dlong]

But you NEVER mix chlorine types together--You don't use floaters with Cal-Hypo that had Tri-chlor in them before. If you have an in-line chlorinator ONLY use Tri-chlor in it.

This last statement concerns me. I do have an in-line chlorinator using Tri-chlor tablets. I seems like you're implying, I shouldn't broadcast (granular) Di-chlor into the pool?

Thanks,

-d

[CarlD]

This last statement concerns me. I do have an in-line chlorinator using Tri-chlor tablets. I seems like you're implying, I shouldn't broadcast (granular) Di-chlor into the pool?

Thanks,

-d

No, no, you can broadcast it safely. I would NOT, however broadcast Di-chlor and Cal-hypo together or one right after another. I wouldn't put it in the skimmer though because some un-dissolved Di-Chlor might make it into the chlorinator. Never put di-chlor or (ESPECIALLY) Cal-Hypo in the chlorinator. Very dangerous, even deadly.

[dlong]

No, no, you can broadcast it safely. I would NOT, however broadcast Di-chlor and Cal-hypo together or one right after another. I wouldn't put it in the skimmer though because some un-dissolved Di-Chlor might make it into the chlorinator. Never put di-chlor or (ESPECIALLY) Cal-Hypo in the chlorinator. Very dangerous, even deadly.

Ah, good. Just to be safe, I'll turn off the inline tri-chlor to isolate it from the system before broadcasting the di-chlor into the pool and turn it on 24 hours later.

Thanks!

-d

[scarywoody]

The wife picked some of this up at costco today. I asked her to pick up some shock at the pool store. She saw this at costco and figured shock is shock. I think they need to be more clear on what effects these things will have on pool chemistry.

[dlong]

The wife picked some of this up at costco today. I asked her to pick up some shock at the pool store. She saw this at costco and figured shock is shock. I think they need to be more clear on what effects these things will have on pool chemistry.

I AGREE!

-d